如何在ASP.NET中将datalist项添加到临时购物车表 [英] How to add datalist item to temporary cart table in ASP.NET
问题描述
嗨每一个，
i想要将我的datalist项添加到临时购物车表（数据表），当我点击datalist项目的图像按钮时。 .plz告诉我，我已经尝试了一些，但它显示了一个项目细节重复，如果我点击另一个项目以前的项目从数据表丢失请帮助我....
我尝试了什么：
hi every one,
i would like to add my datalist item to temporary cart table (data table) , when i am click on image buttton of datalist item ..plz tel me, already i am tried some , but it was showing one item detail repeated , and also if i am click on another item previous item was lost from data table please help me....
What I have tried:
protected void dl_beers_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "item_plus")
{
// Label lblprice = (Label)(e.Item.FindControl("lbl_beer_price"));
Label lblcart = (Label)(e.Item.FindControl("lbl_items_order"));
Label lblitem = (Label)(e.Item.FindControl("lbl_beer_name"));
Label lblpid = (Label)(e.Item.FindControl("lbl_pid"));
int order = Convert.ToInt16(lblcart.Text);
order = order + 1;
int index = e.Item.ItemIndex;
Label lblprice = (Label)dl_beers.Items[index].FindControl("lbl_beer_price");
//for price
float price = float.Parse(lblprice.Text);
price = price * order;
Convert.ToSingle(price);
//add to cart
DataTable dt = new DataTable();
dt.Columns.Add("pid",typeof(string));
dt.Columns.Add("pname",typeof(string));
dt.Columns.Add("pprice", typeof(string));
for (int i = dt.Rows.Count; i <= Convert.ToInt32(lblcart.Text); i++) //for (int i = 0; i <= Convert.ToInt32(lblcart.Text); i++)
{
dt.Rows.Add(lblpid.Text, lblitem.Text, lblprice.Text);
addtocart();
ViewState["dt"] = dt;
this.BindGrid();
}
lblcart.Text = Convert.ToString(order);
}
if (e.CommandName == "item_minus")
{
// int ordercount = Convert.ToInt16(spn_beersorder.InnerText);
Label lblcart = (Label)(e.Item.FindControl("lbl_items_order"));
int order = Convert.ToInt16(lblcart.Text);
if (order > 0)
{
order = order - 1;
// beers_order = order;
lblcart.Text = Convert.ToString(order);
// ordercount = ordercount - 1;
// spn_beersorder.InnerText = Convert.ToString(ordercount);
}
else
{
order = 0;
lblcart.Text = Convert.ToString(order);
// spn_beersorder.InnerText = Convert.ToString(order+"x");
}
}
}
我的aspx代码
----------------------
my aspx code
----------------------
<asp:DataList ID="dl_beers" OnItemCommand="dl_beers_ItemCommand" Width="100%" CellSpacing="10" DataKeyField="pid" ItemStyle-HorizontalAlign="Center" RepeatDirection="Vertical" RepeatColumns="1" RepeatLayout="Table" runat="server">
<HeaderTemplate>
<table><thead>
<table><tbody><tr style=" border-bottom-style: solid;border-width:thin;border-color: #EAEAEA; text-align:center;">
<th>
Item
</th>
<th>
Name
</th>
<th>
Volume
</th>
<th>
Price
</th>
<th style=" text-align:left;">
Order
</th>
</tr></tbody></table>
</thead></table>
</HeaderTemplate>
<itemtemplate>
<table><tbody>
<tr class="c_dl_products_alter">
<td>
<asp:Image ID="img_item_beer" CssClass="img-responsive img img-thumbnail" Height="70px" Width="50px" ImageUrl='<%#"../admin/"+Eval("pimgpath") %>' runat="server" />
</td>
<td>
<asp:Label ID="lbl_beer_name" Font-Bold="true" runat="server" Text='<%#Eval("pname") %>'>
<p runat="server" id="p_beer_desc">
<%#Eval("pdisc") %>
<asp:Label ID="lbl_o" runat="server" Text="Label">
</td>
<td>
<asp:Label ID="lbl_beer_volume" Font-Bold="true" runat="server" Text='<%#Eval("pvolume") %>'>
</td>
<td>
<asp:Label ID="lbl_beer_price" Font-Bold="true" runat="server" Text='<%#Eval("pprice") %>'>
</td>
<td style="text-align:center; width:110px;">
<div class="c_div_btn_cart">
<asp:ImageButton ID="imgbtn_minus" ImageUrl="img/minus.png" CssClass="img-circle img-responsive img c_imgbtns" CommandName="item_minus" CommandArgument='<%#Eval("pid") %>' runat="server" />
</div>
<div class="c_div_itemquntity">
<asp:Label ID="lbl_items_order" Font-Bold="true" CssClass="lbl_p_quantiy" runat="server" Text="0">
</div>
<div class="c_div_btn_cart">
<asp:ImageButton ID="imgbtn_plus" ImageUrl="img/plus.png" CssClass="img-circle img-responsive img c_imgbtns" CommandArgument='<%#Eval("pid") %>' CommandName="item_plus" runat="server" />
</div>
<asp:Label ID="lbl_pid" runat="server" Visible="false" Text='<%#Eval("pid") %>'>
</td>
</tr>
</tbody></table>
</itemtemplate>
//购物车视图
// cart view
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" >
<alternatingrowstyle backcolor="White" forecolor="#284775" />
<columns>
<asp:BoundField DataField="pid" HeaderText="ID" ItemStyle-Width="150" >
<itemstyle width="150px" />
<asp:BoundField DataField="pname" HeaderText="Name" ItemStyle-Width="150" >
<itemstyle width="150px" />
<asp:BoundField DataField="pprice" HeaderText="price" ItemStyle-Width="150" >
<itemstyle width="150px" />
<asp:TemplateField>
<itemtemplate>
<asp:LinkButton ID="LinkButton1" Text="Edit" runat="server" CommandName="Edit" />
</itemtemplate>
<edititemtemplate>
<asp:LinkButton ID="LinkButton2" Text="Update" runat="server" />
<asp:LinkButton ID="LinkButton3" Text="Cancel" runat="server" />
</edititemtemplate>
</columns>
<editrowstyle backcolor="#999999" />
<footerstyle backcolor="#5D7B9D" font-bold="True" forecolor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<pagerstyle backcolor="#284775" forecolor="White" horizontalalign="Center" />
<rowstyle backcolor="#F7F6F3" forecolor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<sortedascendingcellstyle backcolor="#E9E7E2" />
<sortedascendingheaderstyle backcolor="#506C8C" />
<sorteddescendingcellstyle backcolor="#FFFDF8" />
<sorteddescendingheaderstyle backcolor="#6F8DAE" />推荐答案
i would like to add my datalist item to temporary cart table (data table) , when i am click on image buttton of datalist item
i would like to add my datalist item to temporary cart table (data table) , when i am click on image buttton of datalist item
First, replace or your Image with ImageButton control. You would need to handle the adding of items at Click event of your ImageButton instead. For example:
First, replace or your Image with ImageButton control. You would need to handle the adding of items at Click event of your ImageButton instead. For example:
<asp:imagebutton id="btnItemAdd" onclick="btnItemAdd_Click" cssclass="img-responsive img img-thumbnail" height="70px" width="50px" imageurl="<%#"../admin/"+Eval("pimgpath") %>" runat="server" />
Then you can do something like this at Click event:
Then you can do something like this at Click event:
protected void btnItemAdd_Click(object sender, ImageClickEventArgs e){
ImageButton btn = (ImageButton)sender;
DataListItem item = (DataListItem)btn.NamingContainer;
if (item != null)
{
//your add logic here
//gets the ItemIndex
int index = item.ItemIndex;
//access the controls here
Label lblcart = (Label)(item.FindControl("lbl_items_order"));
if (ViewState["CurrentTable"] != null) {
//add items to existing DataTable here
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
//add new items here
if (dtCurrentTable.Rows.Count > 0) {
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = dtCurrentTable.Rows.Count + 1;
dr["Column1"] = lblCart.Text;
//add new row to DataTable
dtCurrentTable.Rows.Add(drCurrentRow);
//Store the current data to ViewState for future reference
ViewState["CurrentTable"] = dtCurrentTable;
}
}
else{
//create the datatable for the first time and add the items
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("Column1", typeof(string)));
//add more columns here based on your requirements
//add the data to the DataTable
dr = dt.NewRow();
dr["RowNumber"] = 1;
dr["Column1"] = lblCart.Text;
dt.Rows.Add(dr);
//Store the DataTable in ViewState for future reference
ViewState["CurrentTable"] = dt;
}
}
}
but it was showing one item detail repeated , and also if i am click on another item previous item was lost from data table
but it was showing one item detail repeated , and also if i am click on another item previous item was lost from data table
It gets repeated because you are looping through all the items in DataList, thus overriding each of your data. The code I’ve provided should fix that, and it should add one item at a time to your DataTable.
It gets repeated because you are looping through all the items in DataList, thus overriding each of your data. The code I've provided should fix that, and it should add one item at a time to your DataTable.
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